The application of inelastic neutron scattering to investigate a hydrogen pre-treatment stage of an iron Fischer–Tropsch catalyst

Warringham, R., Hamilton, N. G., Silverwood, I. P., How, C., Webb, P. B., Tooze, R. P., Zhou, W., Frost, C. D., Parker, S. F. and Lennon, D. (2015) The application of inelastic neutron scattering to investigate a hydrogen pre-treatment stage of an iron Fischer–Tropsch catalyst. Applied Catalysis A: General, 489, pp. 209-217. (doi:10.1016/j.apcata.2014.10.033)

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Abstract

The effect of a hydrogen pre-treatment step on an iron based Fischer–Tropsch catalyst applied to the CO hydrogenation reaction at 623 and 723 K has been investigated by inelastic neutron scattering (INS). The catalyst cannot support methane production over a 6 h period of reaction at 623 K but it is active at 723 K. The INS spectrum indicates the presence of a predominantly aliphatic hydrocarbonaceous overlayer for the post-reaction 623 K sample, whereas the spectrum for the 723 K sample is assigned to an overlayer comprising partially hydrogenated polycyclic aromatic compounds. The hydrocarbonaceous overlayer associated with the active phase of the catalyst is modified by the hydrogen pre-treatment step. The INS spectra are interpreted with reference to microreactor studies, powder X-ray diffraction, temperature-programmed oxidation and transmission electron microscopy. The hydrogen pre-treatment stage favours the formation of amorphous carbon and is deemed not to convey any advantage with respect to CO hydrogenation activity.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lennon, Professor David and Silverwood, Dr Ian and Hamilton, Mr Neil and Warringham, Mr Robbie and How, Mr Colin
Authors: Warringham, R., Hamilton, N. G., Silverwood, I. P., How, C., Webb, P. B., Tooze, R. P., Zhou, W., Frost, C. D., Parker, S. F., and Lennon, D.
College/School:College of Science and Engineering > School of Chemistry
College of Science and Engineering > School of Physics and Astronomy
Journal Name:Applied Catalysis A: General
Publisher:Elsevier BV
ISSN:0926-860X
ISSN (Online):1873-3875

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
442801Towards a molecular understanding of deactivation issues in methane reforming catalystsDavid LennonEngineering & Physical Sciences Research Council (EPSRC)EP/E028861/1CHEM - CHEMISTRY